ระบบสารสนเทศภูมิศาสตร์เพื่อการประเมินผลกระทบสิ่งแวดล้อม : กรณีศึกษาโครงการสะพานพระราม 8 / วรเวชช์ อ่อนน้อม = Geographic information system for environmental impact assessment : a case study of Rama VIII Bridge / Worawaj Onnom
The objective of this study is to use Geographic Information System (GIS) as a supporting tool for environmental impact assessment. The Rama VIII Bridge in Bangkok was selected as a case study. Noise, land - use, and scenery are the key issues that were considered since there are impacts directly affected the people who live around the project area. The mathematical model of Federal Highway Administration (FHWA) has been used for assessing the sound emission level of the traffic on the Bridge. The study shows that the areas impacted by the noise of traffic on the Bridge can be identified by over laying the sound contour maps on top of the land - use map. The noise sensitive areas (i.e. residential places, hospitals, schools, and temples) located in the proximity of 70 - meters away from the Bridge are impacted. The noise level in the area side of the Bridge will be increased to 88 dB(A) compared to79 dB(A) was the approximate noise level measured before the project has been established. The bridge was designed to decrease the scenery blocking of the viewers. The attractive design of the bridge also creates positive view to the viewers. In conclusion, GIS. application was a good supporting tools for environmental impact assessment. In this case, land - use type, location, and size of the impacted areas were identified quickly and effectively.
